ERK inhibition rescues defects in fate specification of Nf1-deficient neural progenitors and brain abnormalities.
ERK inhibition rescues defects in fate specification of Nf1-deficient neural progenitors and brain abnormalities.
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DOI:
10.1016/j.cell.2012.06.034
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发表时间:
2012-08-17
期刊:
影响因子:
64.5
通讯作者:
Zhu Y
中科院分区:
文献类型:
--
作者:
Wang Y;Kim E;Wang X;Novitch BG;Yoshikawa K;Chang LS;Zhu Y
Germline mutations in the RAS/ERK signaling pathway underlie several related developmental disorders collectively termed neuro-cardio-facial-cutaneous (NCFC) syndromes. Patients with these disorders manifest varying degrees of cognitive impairment, but the developmental basis of their brain abnormalities remains largely unknown. Among NCFC syndromes, neurofibromatosis type 1 (NF1) is an exception, as it is caused by loss-of-function heterozygous mutations. Here, we show that bi-allelic Nf1 inactivation promotes Erk-dependent, ectopic Olig2 expression specifically in transit-amplifying progenitors, leading to increased gliogenesis at the expense of neurogenesis in neonatal and adult subventricular zone (SVZ). Nf1-deficient brains exhibit enlarged corpus callosum - a structural brain defect recently linked to severe learning deficits in NF1 patients. Strikingly, these NF1-associated developmental defects are rescued by transient treatment with an MEK/ERK pathway inhibitor during neonatal stages. These studies reveal a critical role for Nf1 in maintaining postnatal SVZ-derived neurogenesis, and identify a potential therapeutic window for treating NF1-associated brain abnormalities.
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